Anesthetizing gas and method of producing the same



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T. A, SWARTZ ANSTHETIZING GAS AND METHOD OF PRODUCING THE SAME illlmh v. w Y

m .w U ww n s) H April 22 1921-16 @Mita/wm Patented Apr. 22, 1924.

1,491,740 UNITED srA'rEsPAraNr ol=1=ic:r..

TOnnENcn A. swAnTz, or HUGUENOT PARK, NEW YORK, AssreNon To THE s. s.

WHITE DENTAL MANUFACTURING COMPANY@ oonroaATIoN or PENNSYLVANIA. Y

ANESTHETIZING GAS A-ND METHOiD. OF PRODUCINGTHE SAME.

l Application tiled Haj 7,

To all whom z't may concern." v

Be it known that I, 'lonnENon A. SwAnTz, a citizen of the United States, and a resident of Huguenot Park, in the county of Rich- I mond, State of New York, have invented, certain new and useful Improvements 1n Anaesthetizing Gases and Methods of Producing the Same," of which the following 1s a speciication, reference belng had to the l accompanying drawing. l a

My invention relates articularly to .gas commonly employed by entists, physicians and surgeons in producing anesthetlc and analgesic conditions in patients to be operated upon, and is especially directed 'to nitrous Oxid gas. y c In administering nitrous oxidgas where a long and continued flow of the gas is required, it has been found that the suspended 20 moisture therein forms frost in the mechanism where it is reduced from the high pressure to the lower pressure suitable for administering, and that such freezing has a.

tendency to produce an uneven flow, and atl u times even check the flow 'of gas entirely thereby tending to produce detrimental eects,`if not serious results.

It is the object of my invention tO provide a commercially satisfactory nitrous 3 oxid gas, in; which the moisture has been reduced-to such a low ercentage as to not interfereA with' the contlnuously smooth and regular flow of the gas while being released from the higlrl pressure cylinder at a rate .5 suitable for its administration or use.

` Other Objects of my. invention are to provide a method of producing a commercially satisfactory nitrous- Oxid gas by which the moisture contained therein 'is reduced to a a minimum.

S eciioally stated, my invention as hereina ter described, comprehends a nitrous Oirid gas which has been passed ,under pressure through dehydrating agents for the u purpose of reducing the moisture contained therein to such an extent that the moisture remaining will not be sucient to cause' the accumulation of a deposit of frost in the mechanism Where the gas is reduced from u a high to a low pressure. The moisture content of such a gas may be so reduced that it will not exceed one-hundredth of one per cent.

My invention further includes all of the u various novel features of the gas and the i920. senin No. 379,444.

method ofproducing the same as hereinafter more definitely specified.

The accompanying drawing diagrammatically represents an apparatus by which the 4 excess molsture Ymay be extracted from the nitrous oxid gas to produce a non-freezing, free-flowing product.v

The apparatus illustrated. comprises the pump or two stage compressor 1, dehydrating cylinders 2 and 3, the coil. and manifold 6, the latter having a .plurality of connection `nipples 7, with which the commercial' containers or lcylinders 9 may be at tached to be filled. Thecylinders 2 and 3 may be conveniently immersed in the tank .of water or other suitable medium 11,

and maintained thereby atv a temperature'v above y its initial temperature, which will 'keep 'the gas passing therethrough in a gaseous' state.

' The coil 5 is disposed in the tank or reservoir 12 of water or other coolingv medium 13,v maintained 'at a temperature requisite to eii'ect liquefaction of said gas. The pump 1 is connected by the pipe-line 15'w1th the lower end of the cylinder 2, which is connected from its upper end by the pipe-line 16 with the lower end of the cylinder 3, vand the upper end of said cylinder 3 is connected by the pipe-line 17 with the coil 5, which in turn is connected by the pipe-line 18 with the manifold 6.

The cylinder 2 is arranged to contain a dehydrating material, such as calcium chlorid,t and the cylinder 3, is arranged to contain -a .dehydrating materia] such as lime, although obviously other dehydrating agents may be advantageously employed it being obvious that such dehydrating agents are maintained in a heated state by the bath sur'ounding the dehydrating cylinders 2 an 3.

The gas is forced under high. pressure by the pump 1 through the pipe-.hne 15 into the cylinder 2, through which, by reason `of its rise in temperature, it changes to a gaseous form, and passes through the pipeline 16 and cylinder 3, lfrom which it is directed through the pipe-line 17 into ther coil'5, where it is liquefied by being cooled, and from where it passes through the pipeline 18 tothe manifold 6 to be distributed to the commercial containers or cylinders 9 through the nipples 7. Cylinders 2 and 3 are preferably heated to a temperature Vsuflicient to heatthe gas passing through out the system is suiicient to liquefy the gas after cooling in the coil 5.

Although I have described the method of dehydrating nitrous oxid gas under ressure, and have designated calcium ch orid and linie as the dehydrating agents, it is to be understood that other agents may be employed, and, therefore, I do not desire to limit my invention to the precise details and materials herein set forth, as lit isobvious that various modifications may be made therein without departing from the essential features of my invention as defined in the appended claims.

Having thus described my invention, I

1. The method o'fproduoing a substantially anhydrous nitrous oxide gas, which consists 1n forcing said gas under pressure -in a heated state through calcium chlorid lime, the vgas and dehydrating agent lacing maintained at a temperaturev above the critical temperature of the nitrous oxide gas.

3. The method of producing a substantially anhydrous nitrous oxide gas,rivhich consists in forcing said gas under high pressure through a heated dehydrating agent, said gas being held at a temperature above the critical temperature of the nitrous oxide gas.

4. The method of producing a substanj tov 6.- A highly compressed nitrous oxide gas y in which the moisture content is so reduced that the gas will flow freely and continuously without formation of frost.

7. A compressed nitrous oxide gas in which the moisture content does not exceed one-hundredth of one per cent. Y y

In witness whereof, I have hereunto set my hand this 3rd day of May, A. 11,1920.

TORRENCE A. SWARTZ.

Witnesses:

JOHN M. RICE, i est.: rw'; J, Klum', 

